Metronome



(No Model.)

B. ZEGKWER.

METRONOME.

No. 360,550. Patented Apr. 5, 1887.

SIMFL 5 MOTION DQUBL 5 MOT ON |NVENTOFL N. PETERS. mmmm n m, Wanhingion.ac

UNITED STATES PATENT OFFI E.

RICHARD ZEOKWER, OF PHILADELPHIA, PENNSYLVANIA.

METRONOME.

SPECIFICATION forming part of Letters Patent No. 360,550, dated April 5,1887.

Application filed December 22, 1886. Serial No. 222.257. (No model.)

To all whom it may concern:

Be it known that I, Rrcrmnn ZECKWER, a subject of the Emperor ofGermany, residing in the city of Philadel phia, Stateof Pennsylvania,have invented a new and useful Improvement in Metronomes, of whichinvention the following is a specification.

The object of my invention is to simplify the form of the instrument inquestion and obtain more accuracy in its action.

My invention consists of the following constituents in combination, viz:First, a graduuated column; second, a tube or trough projectinglaterally from the top of the column; third, a vertical slot in thecolumn; fourth, an index sliding in the slot; fifth, a swinging Weightconnected with the index by means of a chain, cord, or other likeflexible attachment, which passes through said lateral projection, allas hereinafter set forth.

In the annexed drawings, Figure 1 is a front elevation of the metronome;Fig. 2, aside elevation of the same, and Fig. 3 a cross-section of thecolumn on the line 1 2 in Fig. 1. Fig. 4 is a front elevation of thesliding index, and Fig. 5 a plan of the same.

a represents a column, preferably of castiron; I), a vertical slot inthe same; 0, a tube projecting laterallyfrom the column; d, an index,the body 6 of which slides in slot 1); f, a chain attached at one end tothe index (Z and at the other end to a weight, g.

The chain f and weight g constitute a pendulum, measuring from the frontend of tube 0.

it represents a double scale, which shows the number of vibrations ofthe weight g in a minute for different lengths of the pendulum, thefigures on one side of the scale indicating the number of falls in onedirection and those on the other side the number of falls in bothdirections, or the vibrations to and fro. Thus, when the index d pointsto the top numbers, 80 40, the pendulum is at full length and incateseighty vibrations, counting the falls in one direction only, or fortyvibrations, count- :ing the falls in both directions as one. creasingthe length of the column sufliciently a single scale might be employed,but the column would become inconveniently high.

To make use of the instrument, the index is set to indicate the timerequired by any given musical composition, and the weight is drawn toone side and allowed to fall. Its vibrations guide the performer inexecuting the music.

Instead of the chain a cord or other like flexible means of attach mentmight be used; but I prefer the chain. Instead of making the projectionc tubular, it might be an open trough, and instead ofgiving thisprojection an arching form it might be made to project laterally at anyangle; but I prefer to use an arching tube, as shown.

, I claim- A metronome consisting of the column a, provided with theslot 1), the lateral projection c, and graduated scale h, in combinationwith the index (1, chain or other flexible attachmentf, and weighty,substantially as set forth.

RICH. ZEGKNVER. Witnesses:

J. E. SHAW, JNo. A. BELL.

Byin-

